@misc{indiciaeb7c98734caac,
  title = {Optical Flow for Flight and Wind Tunnel Background Oriented Schlieren Imaging},
  author = {Smith, Nathanial T. and Heineck, James T. and Schairer, Edward T.},
  year = {2017},
  url = {https://ntrs.nasa.gov/citations/20180002139},
  note = {Source identifier: 20180002139}
}